The official National Weather Service forecast for Free Soil — 44.1069°N, 86.2168°W, 81.2 miles from I-75. Forecasts here are written by NWS GRR, this county’s forecast office.
| Mason County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 32 | 42 | 55 | 67 | 76 | 80 | 78 | 72 | 59 | 45 | 34 | 56 |
| Avg low °F | 17 | 17 | 24 | 33 | 43 | 53 | 58 | 57 | 50 | 40 | 31 | 23 | 37 |
| Precip in | 2.2 | 1.7 | 2.2 | 3.2 | 3.6 | 3.6 | 3.0 | 3.3 | 2.9 | 3.9 | 3.0 | 2.4 | 35.0 |
1996–2025 normals for Mason County — the climate division Free Soil sits in. All-time county record high 96.1°F (2012-07-07); record low -24.3°F (1996-02-03). Source: NOAA / National Weather Service.